Ni-Ti形状記憶合金の形状拘束時の回復挙動

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タイトル別名
  • Shape Memory Effect of Clamped Ni-Ti Alloys
  • Ni Ti ケイジョウ キオク ゴウキン ノ ケイジョウ コウソクジ ノ カイ

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抄録

Ni-Ti alloys which have large recovery strains and recovery stresses, are used as a functional material. In this study the shape memory effect of clamped Ni-Ti alloys (50.20 and 50.85 at%Ni) has been investigated by tensile tests with heating. Then simulation with a finite element method (FEM) have been carried out to estimate the behavior of the alloys.<BR>The results obtained are summarized as follows:<BR>(1) Dislocation would be generated by slip when a clamped specimen is heated, then it induces internal stress. As a result, on the first heating recovery stress appeared unstable, while on the second heating it became stable and could exceed the first one relatively.<BR>(2) The generation of recovery stress played an important role in obtaining a high apparent Young’s modulus.<BR>(3) FEM analysis proved that the apparent Young’s modulus and the stress generated inside the structure could be controlled by the recovery stress.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 58 (5), 512-518, 1994

    公益社団法人 日本金属学会

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